wikimedia/mediawiki-extensions-VisualEditor
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New approach for handling input in ContentEditable - compare not only plain text but also hash of DOM structure of the particular leafnode (it let's detect spellcheck weird behaviour and react to it)

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This commit is contained in:
Inez Korczynski 2012-02-24 22:37:17 +00:00
parent ed35395ba2
commit 9ba2492fa0
Notes: Gabriel Wicke 2012-02-27 16:40:01 +00:00 
https://mediawiki.org/wiki/Special:Code/MediaWiki/112365
1 changed files with 46 additions and 70 deletions
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116
demos/playground/playground.js
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@ -32,37 +32,46 @@ app = function () {
this.$editor.html("<b>Lorem Ipsum is simply dummy text</b> of the printing and typesetting industry. <b>Lorem Ipsum has been the <i>industry's</i> standard</b> dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it <u>to <b>make <i>a type</i> specimen</b> book.</u>");
this.$editor.addClass('leafNode');
this.lastKeydown = null;
this.keydown = false;
this.keyup = false;
this.keypress = false;
this.mousedown = false;
this.diff = false;
this.prevText = app.getDOMText(this.$editor[0]);
this.prevOffset = null;
this.loop = false;
this.logkey = false;
this.prevText = app.getDOMText(this.$editor[0]).replace(String.fromCharCode(32), " ").replace(String.fromCharCode(160), " ");
this.prevHash = app.getDOMHash(this.$editor[0]);
console.log("Initial hash", this.prevHash);
};
app.prototype.onKeyDown = function( e ) {
if(this.logkey) console.log("onKeyDown", e.which);
if ( this.logkey ) {
console.log("onKeyDown", e.which);
}
this.keydown = true;
this.lastKeydown = e.which;
};
app.prototype.onKeyUp = function( e ) {
if(this.logkey) console.log("onKeyUp", e.which);
if ( this.logkey ) {
console.log("onKeyUp", e.which);
}
this.keyup = true;
};
app.prototype.onKeyPress = function( e ) {
if(this.logkey) console.log("onKeyPress");
if ( this.logkey ) {
console.log("onKeyPress");
}
this.keypress = true;
};
app.prototype.onMouseDown = function( e ) {
if(this.logkey) console.log("onMouseDown");
if ( this.logkey ) {
console.log("onMouseDown");
}
this.mousedown = true;
if(this.loop == false) {
@ -75,76 +84,26 @@ app.prototype.onMouseDown = function( e ) {
app.prototype.loopFunc = function() {
var text = app.getDOMText(this.$editor[0]).replace(String.fromCharCode(32), " ").replace(String.fromCharCode(160), " ");
var hash = app.getDOMHash(this.$editor[0]);
var selection = rangy.getSelection();
if ( !selection.anchorNode ) {
console.log("och");
return;
}
var offset = this.getOffset(selection.anchorNode, selection.anchorOffset);
if(text != this.prevText) {
var textDiffLength = text.length - this.prevText.length;
var offsetDiff = offset - this.prevOffset;
var sameFromLeft = 0;
var l = text.length;
while ( sameFromLeft < l && this.prevText[sameFromLeft] == text[sameFromLeft] ) {
++sameFromLeft;
}
if(false) {
console.log("change start", sameFromLeft, offset);
console.log("different content", textDiffLength);
console.log("different offset", offsetDiff);
}
if ( sameFromLeft != offset - textDiffLength ) {
console.log('spell');
}
/*
else if(textDiffLength === -1 && offsetDiff === -1 && offset === sameFromLeft ) {
console.log("IME.1");
} else if(textDiffLength === 0 && offsetDiff === 0 && offset-1 === sameFromLeft ) {
console.log("IME.2");
} else if ( textDiffLength < 0 || ( offset - textDiffLength ) !== sameFromLeft ) {
console.log("SPELLCHECK");
} else {
console.log("!");
}
*/
if ( textDiffLength !== offsetDiff ) {
//console.log("!!!!#####!!!!!");
}
if(!this.keydown) {
//console.log("## not keyboard");
} else {
//console.log("@@ keyboard");
}
/*
if((this.keydown || this.keyup) && this.lastKeydown !== 229) {
console.log("");
} else {
console.log("Do NOT re-render");
}
*/
console.log("new text");
this.prevText = text;
this.diff = true;
} else {
this.diff = false;
}
this.prevOffset = offset;
if(hash != this.prevHash) {
console.log("new DOM", hash);
this.prevHash = hash;
}
this.keypress = false;
this.keyup = false;
this.keydown = false;
@ -175,6 +134,23 @@ app.getDOMText = function( elem ) {
return ret;
};
app.getDOMHash = function( elem ) {
var nodeType = elem.nodeType,
nodeName = elem.nodeName,
ret = '';
if ( nodeType === 3 || nodeType === 4 ) {
return '#';
} else if ( nodeType === 1 || nodeType === 9 ) {
ret += '<' + nodeName + '>';
for ( elem = elem.firstChild; elem; elem = elem.nextSibling) {
ret += app.getDOMHash( elem );
}
ret += '</' + nodeName + '>';
}
return ret;
};
app.prototype.getOffset = function( localNode, localOffset ) {
var $node = $( localNode );